95 Atx No Power Up High

[brandon1186]

i am just wondering why my power seems to fall off at highway speeds when i floor it it does not pull hard at all also i am leaving overdrive off so it can rev out third gear, down low it pulls like crazy right around 90 it just falls off any ideas????????

 

[techi14]

Secondaries working properly? Opening at 4k?

 

[brandon1186]

yes i checked secondaries i by using the throttle under the hood and they both open perfect

 

[Dave904]

is this something new, or has it always acted this way?

 

[SHOZ123]

I just posted this in another thread, may be the problem.

I should say on thing I have see when trouble shooting through data logging is that the info all looks good but there is a definite problem you can hear and feel in the car. Usually this is a hardware problem that has nothing to do with a PCM input or output.

I had a guy who's car I tuned and it would run great. Until it was warmed up good and out on the highway. If you floored it above 50 or so then it would stumble and miss. Let off and it ran great. 1st & 2nd at WOT great, only in 3rd and at WOT.

The fuel pressure would be low at WOT in the lower gears (above 30 lbs) but the aerodynamic load put an added strain and the fuel pressure would drop to 20 lbs. For what ever the reason it could not flow enough at the highest loads. Data logs looked great but you are only seeing the commanded outputs.

 

[brandon1186]

im thinking its something new mabye i should see if there is new codes would my plug wires cause this if they were old or cam sensor, or tps, all of which are old